. "Any process that modulates the frequency, rate or extent of secondary cell wall biogenesis." . . . "regulation of secondary cell wall biogenesis" . "regulation of cellulose and pectin-containing secondary cell wall biogenesis" . "regulation of plant-type secondary cell wall biogenesis" . "regulation of secondary cell wall anabolism" . "regulation of secondary cell wall biosynthetic process" . "regulation of secondary cell wall formation" . "regulation of secondary cell wall synthesis" . . . . .